Method of manufacturing yarns



Patented Dec. 14, 1937 UNITED STATES PATENT OFFICE METHOD OFMANUFACTURING YARNS No Drawing. Application November 30, 1935, Se-

rial No. 52,421. In Germany December 3,

5 Claims.

This invention relates to the manufacture of yarns or threads and it isa general object of the said invention to produce a yarn which showsremarkable elasticity and a loose, pliant touch. This aim is realized inaccordance with my invention by combining at least two threads one ofwhich is overwound or overtwisted and, at the same time, wrapped like acore by the other normally twisted thread.

Another object of this invention resides in combining at least onenatural and one artificial thread wherein either the natural or theartificial thread may be used as an overtwisted core thread. In apreferred embodiment an overtwisted cotton thread is wrapped by one ormore artificial silk threads.

A still further object of this invention is to cover or wrap the corethread of the yarn by the said enveloping threads in such a way that itis totally or substantially invisible in the final product.

It is also an object of this invention to twine a plurality of yarnseach providing an overtwisted core thread and naturally twisted wrappingthreads.

The overtwisted core thread consists with advantage of vegetable oranimal textile raw materials and is manufactured in the usual manner bya spinning process. However, it is twisted or wound to such a highdegree that, owing to the overtwisting it gets a considerable elasticityand always tends to run back into a contracted or shrivelled condition.

It would also be possible to make the core thread of artificial threadsor fibres. The wrapping threads are put around the core by twisting orspinning. If desired a plurality of overtwisted threads intertwinedtogether could be used.

A compound yarn produced in accordance with this invention shows greatelasticity which is due to the overtwisted core thread and which may beregulated by the degree of overtwisting. As the continuous overtwistedcore thread tends to contract itself and the wrapping threads, the compound yarn, even if provided with wrapping threads of artificialmaterial, exhibits a woollike, loose and pliant touch as well as anelasticity and suppleness which can not otherwise be produced with yarnsof artificial fibres. The present yarn has, thus, a wool-like character.

As a fibrous material suitable for the core and wrapping threads anyknown materials may be used such as sheep's wool, rabbit-wool or otheranimal hairs, silk, floss-silk, fioret-silk, bourret silk, cotton, flax,hemp, jute, yucca, nettle, ramie, all kinds of artificial silks, vistraand staple fibres;

also any mixtures or combinations of such materials may be worked.

The invention permits of producing excellent yarns for needle work ormachine work which yarns may be worked into tissues and fabrics of 5 anykind. It appears that the particular elasticity and the wool-like touchof the inventive yarn will be preserved even if the yarns or fabricsmade thereof are washed or otherwise treated with moisture.

I claim as my invention:

1. The method of manufacturing compound yarns having the suppleness,elasticity, and the loose, pliant feel of wool, which comprises firstover-twisting one or more core threads, normally 15 twisting one or morecovering threads, and finally wrapping said core threads with saidcovering threads, the tendency toward recovery of the overtwisted corecomponent serving to somewhat contract or shrivel said compound yarn.

2. The method of manufacturing compound yarns having the suppleness,elasticity, and the loose, pliantfeel of wool, which comprises firstovertwisting one or more core threads, normally twisting one or morecovering threads, and finally completely covering said core threads withsaid covering threads, the tendency toward recovery of the overtwistedcore component serving to somewhat contract or shrivel said compoundyarn.

3. The method of manufacturing compound yarns having the suppleness,elasticity, and the loose, pliant feel of wool, which comprises firstovertwisting one or more cotton core threads, normally twisting one ormore artificial covering threads, and finally wrapping said core threadswith said covering threads, the tendency toward recovery of theovertwisted core component serving to somewhat contract or shrivel saidcompound yarn.

4. The method of manufacturing compound 40 yarns having the suppleness,elasticity, and the loose, pliant feel of wool, which comprises twistingtogether two or more component yarns made in accordance with the methodset forth in claim 1.

5. A compound yarn having the suppleness, elasticity, and loose, pliantfeel of wool, which comprises at least one overtwisted core thread andat least one covering thread of normal twist wrapped around saidovertwisted core thread, said core and covering threads beingrespectively of different origin, one natural and the other artificial,and the said component yarn being of a somewhat contracted or shrivellednature due to the partial recovery of the overtwisted core cornponent.

WILHELM HOILERUNG.

